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The Historical Development of Atomic Theory Answers

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Which scientist provided a foundation for John Dalton’s work on the atomic structure?

A
Robert Millikan
B
Joseph Proust
C
Ernest Rutherford
D
J. J. Thomson
2
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Which atomic model was proposed as a result of J. J. Thomson’s work?

A
the plum pudding model
B
the indivisible atom model
C
an atom that had a lot of empty space
D
an atom that had a concentrated nucleus
3

What could J. J. Thomson conclude from his experiments?

A
Atoms are mostly empty space.
B
Most of the mass of the atom is concentrated in the center.
C
Atoms must balance positive and negative particles.
D
Atoms are indivisible.
4

Whose work directly resulted in the development of an atomic model that has negative electrons stuck within a sea of positive material?

A
Democritus
B
Rutherford
C
Thomson
D
Dalton
5

Which particle is J. J. Thomson credited with discovering?

A
electron
B
neutron
C
proton
D
photon
6

Which scientist is credited with developing the first scientific atomic theory?

A
John Dalton
B
Joseph Proust
C
Ernest Rutherford
D
J. J. Thomson
7

Which activity best demonstrates Ernest Rutherford’s creativity?

A
questioning the correctness of the plum pudding model
B
designing an experiment to test the plum pudding model
C
making observations about the gold foil experiment
D
summarizing the conclusions from the gold foil experiment as a theory
8

Which statement is most likely true?

A
Ernest Rutherford’s experiment led to the nuclear model of the atom.
B
Ernest Rutherford’s experiment established the plum pudding model of the atom.
C
Robert Millikan’s postulates form the most accepted theory for the atomic structure.
D
Robert Millikan’s results had little impact on determining of the charge of an electron.
9

Which conclusion could be made from Ernest Rutherford’s gold foil experiment?

A
Atoms are made up of mostly empty space.
B
Atoms are mainly solid and block alpha particles.
C
The volume of the nucleus is large compared to the rest of the atom.
D
The mass of the nucleus is small compared to the rest of the atom.
10

Which best describes the effect of J. J. Thomson’s discovery?

A
The accepted model of the atom was changed.
B
The accepted model of the atom was supported.
C
Cathode ray tubes were no longer used in experiments due to poor results.
D
Cathode ray tubes became the only instrument of use in the study of atoms.

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